help question what size turbo to use on my twin wastegate manifold???

[danameisgee]

I got a great deal on a Full Race t6 "style" twin 44mm wastegate manifold.
I wanted to go with a t6766 or t71 billet but i dontknow if its to small for this manifold ??? it came with a t4 adaptor.

i wanna be able to use this manfold and use a t4 turbo but what size?
looking to make around 700hp
i got a fully built head hks 272 cams stock bottom end(2jzgte)
1000cc injectors
aem v2
auto tranny



thanks for the help!

 

[Flateric]

Sounds like and almost looks like you stole my car! Kidding. Can we see a shot of the mani too please?

 

[danameisgee]

Will post pictures. Tonight

 

[danameisgee]

help

 

[te72]

http://www.compturbo.com/products/ct4

 

[87M-GTE]

Is lag an issue? Is money an issue?

There are a lot of turbos out there...

 

[danameisgee]

I wanna go t67 or t71 both t4. Turbos but people are saying that the manifold is to big and the twin wastegate will give me issues.... I wanna be able to drive in the street and drag

 

[Flateric]

I gotta say I have not ever personally seen a dual wastegate manifold. What would be the advantages of such a setup? Anyone?

 

[87M-GTE]

I gotta say I have not ever personally seen a dual wastegate manifold. What would be the advantages of such a setup? Anyone?

Its mostly a high hp thing, more flow to prevent boost creep/maintain steady boost pressure.

OP, why are you set on a "t67 or t71"? The dual WGs will be just as streetable as running one WG.
I would look into the new BW turbos, check out boostlab.com

 

[danameisgee]

I wanted to go t67 b.c. I don't like lag....am only aimming.... For 700hp. max on a auto tranny.. people. Keep telling me that turbo is way to small for that manifold

 

[RacerXJ220]

I'd go with a 91mm turbo with a 150-200 shot.

 

[toyotanos]

In reality, start looking at the GT and GTX series of turbos. Billet compressor wheels are the standard nowadays, and with your split-pulse manifold you can use the sonic energy to help get a larger turbo up quicker. I am local to a guy who ran his mk4 with a TH400 on a Precision (non-billet) 67mm as well as a BorgWarner S374. The 67mm did ~650 at 30psi, and the 74 did 854whp at 32psi. If you want lag free performance, I would suggest the 67mm- it was much more fun to drive around in. Peak numbers were higher on the BW, but it wasn't worth losing all that midrange imo.

So, with that in mind, I would suggest a Billet 67mm turbo, likely a 6769 with a .96-1.1 exhaust hotside, 4" exhaust, 3" IC piping, and a really good intercooler.

One question, what fuel? All of this info is based off of E-85, which is plentiful here in MN. Might not be the same for you.

 

[WI88Supra]

In reality, start looking at the GT and GTX series of turbos. Billet compressor wheels are the standard nowadays, and with your split-pulse manifold you can use the sonic energy to help get a larger turbo up quicker. I am local to a guy who ran his mk4 with a TH400 on a Precision (non-billet) 67mm as well as a BorgWarner S374. The 67mm did ~650 at 30psi, and the 74 did 854whp at 32psi. If you want lag free performance, I would suggest the 67mm- it was much more fun to drive around in. Peak numbers were higher on the BW, but it wasn't worth losing all that midrange imo.

So, with that in mind, I would suggest a Billet 67mm turbo, likely a 6769 with a .96-1.1 exhaust hotside, 4" exhaust, 3" IC piping, and a really good intercooler.

One question, what fuel? All of this info is based off of E-85, which is plentiful here in MN. Might not be the same for you.

Agreed. E85 is a major factor in turbo consideration since you can make more power earlier on a smaller turbo. Given your horsepower goals, that manifold is a bit of overkill, unless you are restricted to pump gas. Then you will need to shoot for the larger end turbos.

 

[87M-GTE]

For a max hp goal of 700, that manifold is kinda over kill...but that doesnt mean you can't run it and have success with it!

I love my BW S366 (now availible with a billet wheel) those are rated at ~850hp, which would be an awesome streetable turbo for you that will meet and exceed you're power goals.

Something to look into..

 

[Albert]

The new 6766. That's what I'm getting

 

[danameisgee]

I wanna go e85 but there no gas. Station near me that sell it. So am kinda stuck. With. 93 octane.... I. Would do a shot but. Am. Scared. Don't wanna blow up my stock block .

 

[danameisgee]

Im thinking about going on e85 fuel but i know i gotta get bigger injectors (i have a 1000cc percision)whats the best/cheapest injectors i can go with?

 

[Albert]

Injector dynamic

 

[gurley0916]

those are the best but not the cheapest...precisions are known to work with e85 but are not warranteed.

 

[destrux]

I gotta say I have not ever personally seen a dual wastegate manifold. What would be the advantages of such a setup? Anyone?

The major benefit of a divided, twin wastegate manifold is that the divided sides of the manifold stay completely divided for the best possible effect of a twin scroll turbo. If the two sides share a single wastegate, some exhaust pulses from one side will "contaminate" the other side through the wastegate inlet pipes.

Generally, with a turbo this large boost creep isn't an issue because you're not usually trying to run low boost (at least, you shouldn't be!), and boost spiking isn't an issue because a turbo this large won't normally spool that fast.